Here's a close-up of the height of the turret.

And here's another from the back.

The Terminator 2 is manned by a crew of 3, unlike the first version of the Terminator, which had a crew of 5.

The first Terminator, seen below, was unveiled in the late 1990s.

The main difference between the first and second Terminators is that the first came with two hull-mounted 30 mm automatic grenade launchers in addition to all the other weapons. The first version also had a more expensive T-72 tank hull, and a turret with the Ataka missiles mounted vertically.

While the Terminator 2 is lighter, cheaper and easier to operate than the first Terminator, it also has less firepower and can only fire at one target at a time, while the first could fire at three targets at a time.

Below is the most recent Terminator, the Terminator 3 or T-15, which is part of the new Armata Universal Combat Platform series.

Vitaly Kuzmin

These Armata vehicles, which includes the T-14 tank, are still prototypes and have yet to be mass produced. As such, it's still unclear which vehicles are part of the Armata series, and what the capabilities of the T-15 or Terminator 3 are. Nevertheless, if this T-15 truly is the third Terminator, it appears to only have one 30mm cannon.

Source: Sim Tack, chief military analyst at Force Analysis, and former Stratfor analyst.